Charles r



(No Modal.)

C. R. DAVENPORT.

BICYCLE.

No. 420,145 Ptentd- Jan. 28.1890.

UNITED STATES PATENT OFFICE.

CHARLES R. DAVENPORT, OF WVASHINGTON, DISTRICT OF COLUMBIA.

BICYCLE.

SPECIFICAION forming pait of Letcers Patent No. 420,145, dated J anuary28, 1890.

Application filed Angust 22, 1889. Serial No. 321,683. (No model.)

T0 aZZ whom it may concern:

Be it kn0Wn that 1, CHARLES R. DAVEN- PORT, of the city of Washingtonand District of Colnmbia, have invented certain new and usefulImprovements in Bicycles, of which the followin is a specification.

My invention has reference to bicycles; and the object of the inventionis to increase the speed of bicycles without any additional physicalexertion on the part of the rider than at present is exercised.

My invention consists in the arrangement and adaptation of a train ofgear-wbeels for propelling a bicycle.

In the accompanying drawing, forming part of this specification, thefigure is a side view of a bicycle with my invention attached.

A is the large gearwheel, which gives increased speed to the bicycle.

A is the small gear-wheei, connected with ge( r-wheel A on the sameaxle.

B is the gearwheel to which the tieadles are attached.

0 is the gear-chain connecting gear-wheels B and A.

0 is the gearchain connecting the gearwheels A and c.

Inthe train of gear-wheels, A and B are the same size, and are eachone-half the diameter cf gearwheel A, and gear-wheel 0 is onefonrth ofthe diameter of A.

My invention operates substautially as follows: When the gearwhee1 Bmakes one revolution, it causes the gear-wheel A, by means of thegearchain O, to make one revolution, 5 and gear-wheel A, being a part ofand attached t0 gearwheel A on the same axle, causes A to make onerevolntion. When A makes one revolntion, it causes c, by means of thegearchain C to make four revolutions, 0

and c, being a part of and joined to the bi cycle-wheel D on the sameaxle, causes it to make four revolutions in the same time. It Will thnsbe seen that when the rider causes the gearwheei B to revolve oncethe-wheel D, by the mechanism described, Will make four revolntons.

. While I have described my train cf gearwheels as adapted to a bicycle,it may be applied in other ways, and I do not desire to limit myself toany particular use.

Having described my invention and its 0peration, what 1 claim, anddesire to secnre by Letters Patent, is

In a bicycle, the combination of the gearwheels A, A, B, and c, and thegear-chains C and C, arranged and operating substantially as described.

CHARLES R. DAVENPORT. Witnesscsz SAMUEL A. DRUBY,

G110. I. HILL.

